Coherent quantum switch driven by optimized laser pulses

E. Räsänen; A. Castro; J. Werschnik; A. Rubio; E. K.U. Gross

doi:10.1016/j.physe.2007.09.181

Coherent quantum switch driven by optimized laser pulses

E. Räsänen^*, A. Castro, J. Werschnik, A. Rubio, E. K.U. Gross

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We present two models of coherent quantum switches constructed from a single-electron quantum ring and a double quantum dot, respectively. The systems are driven by picosecond laser pulses obtained using quantum optimal control theory. The optimized pulses generate electron-current flips in the ring (magnetic switch) and electron transport in the double dot (charge switch) in significantly shorter times and higher accuracies than previously used finite-length continuous waves. This opens applicable paths into coherent single-qubit gates operated by terahertz lasers.

Original language	English
Pages (from-to)	1593-1595
Number of pages	3
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	40
Issue number	5
DOIs	https://doi.org/10.1016/j.physe.2007.09.181
State	Published - Mar 2008
Externally published	Yes

Keywords

Double quantum dot
Optimal control theory
Quantum ring
Qubit

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10.1016/j.physe.2007.09.181

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abstract = "We present two models of coherent quantum switches constructed from a single-electron quantum ring and a double quantum dot, respectively. The systems are driven by picosecond laser pulses obtained using quantum optimal control theory. The optimized pulses generate electron-current flips in the ring (magnetic switch) and electron transport in the double dot (charge switch) in significantly shorter times and higher accuracies than previously used finite-length continuous waves. This opens applicable paths into coherent single-qubit gates operated by terahertz lasers.",

keywords = "Double quantum dot, Optimal control theory, Quantum ring, Qubit",

author = "E. R{\"a}s{\"a}nen and A. Castro and J. Werschnik and A. Rubio and Gross, {E. K.U.}",

year = "2008",

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T1 - Coherent quantum switch driven by optimized laser pulses

AU - Räsänen, E.

AU - Castro, A.

AU - Werschnik, J.

AU - Rubio, A.

AU - Gross, E. K.U.

PY - 2008/3

Y1 - 2008/3

N2 - We present two models of coherent quantum switches constructed from a single-electron quantum ring and a double quantum dot, respectively. The systems are driven by picosecond laser pulses obtained using quantum optimal control theory. The optimized pulses generate electron-current flips in the ring (magnetic switch) and electron transport in the double dot (charge switch) in significantly shorter times and higher accuracies than previously used finite-length continuous waves. This opens applicable paths into coherent single-qubit gates operated by terahertz lasers.

AB - We present two models of coherent quantum switches constructed from a single-electron quantum ring and a double quantum dot, respectively. The systems are driven by picosecond laser pulses obtained using quantum optimal control theory. The optimized pulses generate electron-current flips in the ring (magnetic switch) and electron transport in the double dot (charge switch) in significantly shorter times and higher accuracies than previously used finite-length continuous waves. This opens applicable paths into coherent single-qubit gates operated by terahertz lasers.

KW - Double quantum dot

KW - Optimal control theory

KW - Quantum ring

KW - Qubit

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JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 5

ER -

Coherent quantum switch driven by optimized laser pulses

Abstract

Keywords

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